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100 C1572M (9/05)
CM9760-DFL REAR PANEL DOWNFRAME LOOPING CARD
The CM9760-DFL rear panel card (refer to Figure 54) is used in the last CM9760-MXB(-X) or CM9760-MXBL bay in a downframe configuration.
The CM9760-DFL card provides the capability to loop out video—the card provides 16 BNCs that can connect to video output devices such as
monitors, VCRs, and matrix switchers. Note, however, that the card can be used in the CM9760-MXB(-X) to increase the number of available
video output devices regardless of whether looping is required. When used in the CM9760-MXB(-X), the CM9760-DFL card connects to a
CM9760-VCC video input card, which is installed into the front of the matrix bay.
The CM9760-DFL card is the only card that is used in the CM9760-MXBL, which is an unpowered downframed matrix bay that contains 16 DFL
card slots for supporting up to 256 video loop-out connections.
A downframe cable is supplied with the CM9760-DFL card. For detailed information about downframing using the CM9760-DFL card, refer to the
Downframing section and to the Downframing to the CM9760-MXBL section as appropriate.
Figure 54. CM9760-DFL Downframe Looping Card
As illustrated in Figure 54, the CM9760-DFL card includes the following:
• BNC Connectors (16): Provide the physical connection point for coaxial cable
• Termination Jumpers JP1-JP16: Allow video to be terminated (jumper positions 1 and 2) or unterminated (jumper positions 2 and 3):
– When looping to another device is required, termination jumpers must be set in the unterminated position. Termination must occur at
the final device.
– When looping is not required, termination jumpers must be set in the terminated position.
The jumpers are set in the appropriate position when your system is configured at the factory. However, if you change your system—for
example, add or replace a card—you may need to change the termination.
• Downframe Connector: Sixteen-pin connector that connects to downframe cable
16 VIDEO
INPUT BNCs
DOWNFRAME
CONNECTOR
JP1-JP16
UNTERMINATED TERMINATED